Hi Xu, ... > > Firstly, can you try mkfs.xfs -m reflink=0 way whether fix these two > > problems? > You can also just increase dev_min_size to 512 to check whether fix this > logsize problem. No, using .dev_min_size = 512 (and removing .dev_fs_opts "-m reflink=0") does not help (fails as without any fix). Kind regards, Petr